GB1186315A - Photographic Developer for Obtaining Colour Toned Positive Silver Prints - Google Patents

Photographic Developer for Obtaining Colour Toned Positive Silver Prints

Info

Publication number
GB1186315A
GB1186315A GB26176/68A GB2617668A GB1186315A GB 1186315 A GB1186315 A GB 1186315A GB 26176/68 A GB26176/68 A GB 26176/68A GB 2617668 A GB2617668 A GB 2617668A GB 1186315 A GB1186315 A GB 1186315A
Authority
GB
United Kingdom
Prior art keywords
photographic developer
positive silver
toned
obtaining colour
silver prints
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB26176/68A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chemisches Laboratorium Fritz Walter Lange GmbH and Co KG
Original Assignee
Chemisches Laboratorium Fritz Walter Lange GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19671547660 external-priority patent/DE1547660A1/en
Application filed by Chemisches Laboratorium Fritz Walter Lange GmbH and Co KG filed Critical Chemisches Laboratorium Fritz Walter Lange GmbH and Co KG
Publication of GB1186315A publication Critical patent/GB1186315A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/305—Additives other than developers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Pyridine Compounds (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

1,186,315. Photographic silver halide developer. CHEMISCHE LABORATORIUM FRITZ-WALTER LANGE G.m.b.H. May 31, 1968 [June 1, 1967], No.26176/68. Heading G2C. A photographic silver halide developer giving a brown toned silver image contains hydroquinone and 0.01 - 1.0% of 3:4-diaminopyridine or a compound of the formula:- where R 1 , R 2 , R 3 and R 4 are each hydrogen, alkyl of C 1 - C 4 , hydroxyalkyl, aminoalkyl or alkoxyalkyl and X and Y are each hydrogen, hydroxyl or alkoxy. Other developing agents such as metal, 1-phenyl-pyrazolidone and 1-phenyl-3- amino-pyrazolidone may be present.
GB26176/68A 1967-06-01 1968-05-31 Photographic Developer for Obtaining Colour Toned Positive Silver Prints Expired GB1186315A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671547660 DE1547660A1 (en) 1967-06-01 1967-06-01 Photographic developer for the creation of color-toned positive silver images

Publications (1)

Publication Number Publication Date
GB1186315A true GB1186315A (en) 1970-04-02

Family

ID=5676519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26176/68A Expired GB1186315A (en) 1967-06-01 1968-05-31 Photographic Developer for Obtaining Colour Toned Positive Silver Prints

Country Status (2)

Country Link
US (1) US3615492A (en)
GB (1) GB1186315A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881360A (en) * 1973-07-09 1975-05-06 Rodrigo Jurado Measuring dispensing device

Also Published As

Publication number Publication date
US3615492A (en) 1971-10-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees